#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>

int main()
{	
	pid_t id = fork();
	if (id == 0)
	{
		//child
		int count = 5;
		while(count)
		{
			printf("我是子进程，我正在运行：%d\n", count);
			sleep(1);
			count--;
		}
	}
	else
	{
		//father
		while(1)
		{
			printf("我是父进程，我正在运行...\n");
			sleep(1);
		}
		
	}
	return 0;
}
